Bell Work According to the phase diagram below, what is the boiling point of this substance at a pressure of 30 atmospheres? C. Johannesson.

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Presentation transcript:

Bell Work According to the phase diagram below, what is the boiling point of this substance at a pressure of 30 atmospheres? C. Johannesson

Ch. 1 - Matter II. Classification of Matter (p.15-17, 397-398) Matter Flowchart Pure Substances Mixtures C. Johannesson

Can it be physically separated? A. Matter Flowchart MATTER yes no Can it be physically separated? MIXTURE PURE SUBSTANCE Is the composition uniform? no yes Can it be chemically decomposed? no yes Homogeneous Mixture (solution) Heterogeneous Mixture Compound Element Colloids Suspensions C. Johannesson

Matter Matter is everywhere. Matter is anything that takes up space and has mass. Matter is constantly experiencing both chemical and physical changes.

A. Matter Flowchart Examples: graphite pepper sugar (sucrose) paint soda element hetero. mixture compound solution C. Johannesson

B. Pure Substances Element composed of identical atoms EX: copper wire, aluminum foil C. Johannesson

B. Pure Substances Compound composed of 2 or more elements in a fixed ratio properties differ from those of individual elements EX: table salt (NaCl) C. Johannesson

B. Pure Substances Law of Definite Composition A given compound always contains the same, fixed ratio of elements. Law of Multiple Proportions Elements can combine in different ratios to form different compounds. C. Johannesson

Two different compounds, each has a definite composition. B. Pure Substances For example… Two different compounds, each has a definite composition. C. Johannesson

C. Mixtures Variable combination of 2 or more pure substances. Heterogeneous Homogeneous C. Johannesson

C. Mixtures Solution homogeneous very small particles no Tyndall effect Tyndall Effect particles don’t settle EX: rubbing alcohol C. Johannesson

C. Mixtures Colloid heterogeneous medium-sized particles Tyndall effect particles don’t settle EX: milk C. Johannesson

C. Mixtures Suspension heterogeneous large particles Tyndall effect particles settle EX: fresh-squeezed lemonade C. Johannesson

C. Mixtures Examples: mayonnaise muddy water fog saltwater Italian salad dressing colloid suspension solution C. Johannesson